23 results about "Peroxydisulfate" patented technology

The invention relates to a water treatment and membrane separation technology, and provides an integrated catalytic separation membrane, a preparation method thereof, and a water treatment method and system. According to the membrane, polyvinylidene fluoride is used as a continuous phase to form a porous matrix, and cerium dioxide is embedded and fixed in a mode of uniform dispersion in a membrane body in a phase inversion membrane forming process; in the presence of illumination and peroxysulfate, active species are generated through in-situ activation on a membrane-water interface, and membrane separation is completed synchronously. The water treatment method comprises the following steps: adding peroxymonosulfate or peroxydisulfate into a water body to be treated, and filtering through the membrane under illumination; the photothermal effect generated by organic matter degradation intermediates in operation inhibits membrane pollution and maintains flux. According to the invention, short-range coupling of active sites and mass transfer channels is realized, the medicament and energy utilization rate is improved, the coating stripping and metal dissolution risk is reduced, and the method is suitable for drinking water pretreatment, reclaimed water deep treatment and treatment of water containing natural organic matters / humic acid.

The invention discloses a sustainable purification method based on nanobubbles, and relates to the technical field of water treatment. The sustainable purification method based on the nanobubbles comprises the following steps: preparing a nanobubble solution through a nanobubble generator; mixing the nano-bubble solution with hydrogen persulfate to activate the hydrogen persulfate, and promoting decomposition of the hydrogen persulfate on a nano-bubble interface to generate free sulfate radicals; the peroxydisulfate is used for water treatment and purification after being activated. By means of the innovative structural design and the utilization of the characteristics of the nano bubbles, the oxidative degradation efficiency is improved, meanwhile, the purification capacity can be kept as long as several months, low-energy-consumption, pollution-free and sustainable green environment restoration is achieved, and an efficient, environment-friendly and economical new way is provided for water pollution treatment.

The invention relates to a method and a system for producing an oxidant solution, comprising an electrochemical cell having an anode and a cathode, the method comprising the steps of: (i) supplying a raw electrolyte to a reaction region between the anode and the cathode, the raw electrolyte consisting of sulfate ions (SO42-) and ferrous ions (Fe2 +); (ii) during a run cycle, electrolyzing the feedstock electrolyte to produce an oxidized acid solution comprising peroxydisulfate (S2O8 < 2->) and iron ions (Fe < 3 + >); and (iii) supplying the oxidized acid solution. The oxidant solution is preferably used to leach metals from wastes including electronic wastes and metal-containing ores.

The application discloses application of a pre-oxidized zero-valent iron / peroxyacetic acid system in removal of chlorophenol organic pollutants, and specifically comprises the following operation process: adding the peroxyacetic acid as an oxidant in an organic pollutant solution containing the chlorophenol, adjusting pH, and adding the pre-oxidized zero-valent iron to activate the peroxyacetic acid to generate hydroxyl radicals and high-valence iron to remove the chlorophenol organic pollutants; and the pre-oxidized zero-valent iron is prepared by mixing and grinding the zero-valent iron and peroxydisulfate. The pre-oxidized zero-valent iron is used for activating the peroxyacetic acid to remove the chlorophenol organic pollutants, and has higher reaction activity and longer service life compared with the heterogeneous zero-valent iron.

Organometallic precursor solutions containing one or more peroxide compositions, such as hydrogen peroxide, urea hydrogen peroxide, and organo peroxydisulfates, are described. Corresponding coated substrates and radiation patterned substrates as well as methods of preparing organometallic precursor solutions containing a peroxide composition are also described. Novel organo peroxydisulfates and a technique for synthesizing an organo peroxydisulfate are further described. The incorporation of a peroxide composition into an organometallic photoresist composition is described as a way to increase stability of organometallic precursor solutions and / or to improve the patterning performance of organometallic photoresist coatings.

This invention provides a method for preparing sulfated polysaccharides suitable for the production of microcapsules. [Solution] The present invention relates to a method for preparing sulfated polysaccharides. A mixture comprising at least one polysaccharide and at least one polar aprotic solvent is prepared in this method. At least one sulfating agent, at least one acetylating agent, and at least one peroxydisulfate are added to the mixture, and the mixture is then subjected to a temperature treatment so that at least one polysaccharide is converted to at least one sulfated acetate polysaccharide. At least one sulfated acetate polysaccharide is separated from the mixture and converted to a sulfated polysaccharide. The present invention further relates to sulfated polysaccharides that can be prepared using the method according to the present invention. The present invention further relates to microcapsules and methods for producing microcapsules.

The application belongs to the technical field of resource utilization of medicinal residue, and particularly relates to a method for selectively extracting cellulose from medicinal residue by oxidation. The method for selectively extracting cellulose from medicinal residue by oxidation provided in the application can efficiently extract cellulose from medicinal residue waste in one step, and realize harmless disposal and resource utilization of medicinal residue waste. The application uses medicinal residue waste as raw material, does not need any pretreatment, removes non-cellulose plant components based on one-step oxidation of potassium peroxydisulfate, efficiently and selectively extracts cellulose, and the purity of the extracted cellulose is as high as 95%. In the application, potassium peroxydisulfate as a strong oxidant degrades the amorphous region of medicinal residue waste, avoiding the removal of non-cellulose plant components by pretreatment. The method provided in the application does not involve toxic or costly chemical reagents, is simple in steps, short in time consumption, low in energy consumption, small in wastewater production, low in COD value, and realizes the recycling of cellulose.

The present invention discloses a method for detecting hydroquinone in water using chemiluminescence. The chemiluminescence system consists of hydroquinone, peroxydisulfate, and sodium hydroxide. The core of the present invention is that when hydroquinone is added to a mixed solution of peroxydisulfate and sodium hydroxide, chemiluminescence can be generated, and the intensity of the chemiluminescence is positively correlated with the concentration of hydroquinone. A feature of the present invention is that the constructed hydroquinone-peroxydisulfate-sodium hydroxide chemiluminescence method does not require the addition of an additional fluorescent agent, and hydroquinone plays the dual role of a co-reactant and a luminescent agent. The chemiluminescence of the present invention can be used for the selective detection of hydroquinone.

The invention discloses a distributed landfill leachate treatment device and method based on plant bionics. The device comprises a bionic trunk and bionic blades, and each bionic blade comprises a porous base layer, a capillary tube and a photothermal conversion layer; the method comprises the following steps: uniformly mixing a peroxydisulfate oxidizing agent and the landfill leachate, conveying the landfill leachate to the bionic blades through the bionic trunk, and permeating and dispersing the landfill leachate in the porous base layer through the capillary tubes; the photo-thermal conversion layer absorbs heat converted by sunlight to activate a peroxydisulfate oxidizing agent to oxidize and degrade organic pollutants in the landfill leachate, and meanwhile, the landfill leachate in the leaves is evaporated; according to the invention, low-cost and high-efficiency treatment of the landfill leachate is realized; due to the oxidation effect of the thermally activated persulfate, water vapor generated in the evaporation process is purified, moisture volatilized into the air is odorless, and the surrounding air is not polluted; and the method has a good application prospect in the scenes of garbage storage stations, transfer stations, small garbage plants and the like.

The invention discloses a CuFeCo-LDH / BC catalyst, which is prepared from CuFeCo-LDH and biochar, and the biochar is uniformly distributed on the surface of the CuFeCo-LDH; the CuFeCo-LDH is prepared by taking a solution A and a solution B as raw materials and adopting a coprecipitation reaction; the solution A is a mixed aqueous solution of Cu < 2 + >, Co < 2 + > and Fe < 3 + >, and the solution B is a mixed aqueous solution of OH <-> and CO3 < 2->. The CuFeCo-LDH / BC catalyst promotes the generation of various active species under the synergistic effect of peroxydisulfate or peroxymonosulfate activation, metal redox cycle and biochar, so that SMX is thoroughly degraded. And meanwhile, the CuFeCo-LDH / BC catalyst has universality on degradation of the antibiotics. The invention also discloses an application of the CuFeCo-LDH / BC catalyst in degradation of sewage containing antibiotics.

The invention discloses a method for inhibiting resistant gene conjugational transfer based on a Mo monatomic catalyst activated peroxydisulfate system. The method is characterized in that the Mo monatomic catalyst activated peroxydisulfate system inhibits resistance gene conjugational transfer by activating oxidative stress response, destroying membrane permeability, interfering energy metabolism and inhibiting biological membrane formation, the Mo monatomic catalyst is a Mo / NC catalyst, and the catalyst can efficiently activate PDS to generate active species 1O2 and SO4. The method realizes effective removal of ARB and ARGs in water, and active species induce oxidative stress to trigger SOS reaction in the reaction process, so as to inhibit ATP synthesis and reduce energy supply, thereby inhibiting conjugation transfer of ARGs. Scientific basis and technical solution can be provided for promoting treatment of drug-resistant pollution in the water environment.

The preparation method comprises the following steps: by taking starch, glucose or cellulose as a carbon source, imidazole or phenanthroline as a nitrogen source and mixed inorganic salt as a pore-foaming agent, carrying out ball-milling mixing, pre-carbonization, carbonization, washing and drying to prepare a nitrogen-containing micropore-mesoporous carbon material with super-large mesopores; the material contains a cross-linked microporous / mesoporous carbon structure, the mesoporous aperture is 3.7-28.3 nanometers, and the micropore aperture is 0.53-0.56 nanometers. The micropore-mesopore coexistence structure is beneficial to adsorption of phenol molecules and desorption of products; nitrogen, carbon and oxygen elements are uniformly distributed, the nitrogen element exists in forms of pyridine nitrogen, graphite nitrogen and pyrrole nitrogen and can efficiently catalyze potassium peroxydisulfate to generate hydroxyl free radicals, singlet oxygen and sulfate anion free radicals, and phenol is efficiently degraded. According to the method, no mesoporous silicon template agent is used, the steps are few, and the preparation cost is low; and the nitrogen content, the specific surface area, the mesoporous volume and the mesoporous aperture can be regulated and controlled.

A semiconductor process wastewater treatment system and a method for treating semiconductor process wastewater using the system are disclosed. The disclosed semiconductor process wastewater treatment system comprises: an advanced oxidation reaction tank for advanced oxidation of a semiconductor process wastewater comprising tetramethyl ammonium hydroxide (TMAH) using a UV / PDS process that activates peroxydisulfate (PDS) with ultraviolet light (UV ray); an anaerobic biological reaction tank for biologically treating the semiconductor process wastewater that has passed through the advanced oxidation reactor, the anaerobic biological reaction tank configured to treat the semiconductor process wastewater with microorganisms comprising sulfate reducing bacteria (SRB) under anaerobic conditions, and configured to react sulfate generated in the advanced oxidation reactor with the sulfate reducing bacteria to generate H2S; and a gas separator for separating the H2S from gas generated in the anaerobic biological reactor.

The present invention proposes a method for preparing pulp-based organic high-molecular-weight flocculants using a microbubble interface enhancement method, as well as its products and applications, belonging to the technical fields of solid waste resource utilization and water treatment agents. The present invention mixes papermaking pulp with nitric acid, then heats and stirs the mixture. After adjusting the pH to a weakly acidic state, a cellulose mixture is obtained. The cellulose mixture is heated, nitrogen is introduced into the cellulose mixture using a microbubble interface enhancement method, and disodium peroxyethylenediaminetetraacetic acid and potassium peroxydisulfate are added. A methacryloyloxyethyltrimethylammonium chloride solution is then added dropwise, followed by potassium peroxydisulfate for reaction. After the reaction is completed, the mixture is cooled to room temperature, purified, frozen, and dried to obtain a pulp-based organic high-molecular-weight flocculant. The above-mentioned flocculant is more effective than other cellulose-based flocculants in removing negatively charged antibiotics, has a wide range of applications, and can achieve an antibiotic removal rate of over 50% at a dosage of approximately 2.0 mg / L.

The invention provides a method for cooperatively treating organic wastewater by utilizing persulfate, which comprises the following steps: (1) adding peroxymonosulfate into the organic wastewater, mixing, and performing primary thermal activation treatment to obtain a mixed solution; and (2) adding peroxydisulfate into the mixed solution obtained in the step (1), mixing, and carrying out secondary thermal activation treatment to realize the overall treatment of the organic wastewater. According to the method disclosed by the invention, the peroxymonosulfate and the peroxydisulfate are synergistically utilized, so that antibiotics in the organic wastewater are effectively degraded, and meanwhile, a higher total organic carbon removal rate is achieved; and the method has the advantages of high efficiency, low cost, no secondary pollution and the like, and has a good application prospect.

The invention describes a process for producing soluble salts of 5,5-azotetrazole (5,5-AT) by oxidation of 5-aminotetrazole with a soluble peroxodisulfate in a strongly alkaline environment. This compound is a precursor of the energetic component of non-toxic priming mixtures, 5,5- bis-hydrazino-tetrazole (BTH). BTH can be prepared by reduction of salts or solutions of 5,5-AT with ascorbic acid. 5,5-AT

The invention belongs to the technical field of industrial solid waste resource utilization and wastewater treatment, and particularly relates to polyacrylamide modified iron mud biochar as well as a preparation method and application thereof. According to the invention, iron mud is used as a raw material, polyacrylamide is used as a flocculant and a slow-release nitrogen source at the same time, and the nitrogen-doped iron mud biochar is prepared through hydrothermal reaction and oxygen-limited pyrolysis. The material has a porous sheet layer and a core-shell structure, and zero-valent iron nanoparticles are tightly coated by a carbon shell. When being used as a catalyst for activating peroxydisulfate to treat antibiotic wastewater, the catalyst shows excellent catalytic activity and universality, and can efficiently degrade various antibiotic pollutants. The catalytic system takes singlet oxygen as a dominant non-free radical path, and has strong anti-interference capability and high reaction selectivity. According to the method, high-value recycling of the iron sludge is realized, and an efficient solution is provided for antibiotic wastewater treatment.

The present invention discloses a method for electrochemical catalytic degradation of bisphenol A based on iron-nitrogen-carbon particle electrodes. The present invention uses cellulose, ferric nitrate and melamine as precursors, prepares Fe-N-C material by a solvent-free method, and constructs a Fe-N-C / peroxydisulfate three-dimensional electrode system to electrochemically catalyze the removal of bisphenol A. The Fe-N-C material serves as both a particle electrode in the three-dimensional electrode and a catalyst for peroxydisulfate. The oxidation of peroxydisulfate mainly occurs on the catalyst surface. The Fe-N-C material has good adsorption capacity, which allows pollutants to be enriched on its surface for removal. The sp 2‑ The presence of hybrid structure, π-π bond and electron-rich functional groups gives it broad application prospects in the field of persulfate advanced oxidation treatment.

To provide a method of preparing an electrochemically active cathode material.SOLUTION: A method includes the steps of: combining an alkali metal-containing nickel oxide having a formula A1-aNi1+aO2 in which A comprises an alkali metal and a is greater than 0 and less than or equal to 0.2, with a fluid composition containing an oxidant comprising a peroxydisulfate salt, a monopersulfate or a combination thereof to form a mixture; heating the mixture to a temperature of 50°C or higher; and maintaining the mixture at the temperature at least for a period of time sufficient to form an alkali metal-deficient nickel oxide electrochemically active cathode material having a general formula AxHyNi1+aO2 nH2O in which A comprises an alkali metal, x is greater than or equal to 0.08 and less than 0.2, y is greater than or equal to 0 and less than 0.3, a is greater than or equal to 0.02 and less than or equal to 0.2, and n is greater than 0 and less than 2.SELECTED DRAWING: None

Organometallic precursor solutions containing one or more peroxide compositions, such as hydrogen peroxide, urea hydrogen peroxide, and organo peroxydisulfates, are described. Corresponding coated substrates and radiation patterned substrates as well as methods of preparing organometallic precursor solutions containing a peroxide composition are also described. Novel organo peroxydisulfates and a technique for synthesizing an organo peroxydisulfate are further described. The incorporation of a peroxide composition into an organometallic photoresist composition is described as a way to increase stability of organometallic precursor solutions and / or to improve the patterning performance of organometallic photoresist coatings.

The utility model relates to the technical field of wastewater treatment, in particular to an ultraviolet-peroxydisulfate-ozone combined advanced oxidation wastewater treatment device which comprises a tank body, a sludge discharge port is formed in the bottom of the tank body, a sewage inlet and a clear water outlet are symmetrically formed in the center of the bottom end and the center of the top end of the tank body, and a medicine feeding port is formed in the top end of the tank body. After being added, the medicine and sewage entering from the lower portion form convection impact, an ultraviolet lamp which activates the medicine and has an oxidation effect on the sewage is arranged in the tank body, and an ozone feeding opening is further formed in the bottom end of the tank body. According to the scheme, medicines are activated through the ultraviolet lamp to generate sulfate free radicals and hydroxyl free radicals, the oxidation effect on sewage is achieved through cooperation with the oxidation and disinfection effects of ultraviolet rays, meanwhile, the further synergistic degradation effect is achieved through cooperation with ozone, and therefore the purification treatment requirement for high-concentration organic pollutants can be met; the processing efficiency is improved.

The invention discloses porous carbon with photo-thermal performance and a preparation method and application thereof.The method comprises the following steps that 1, NaCl and KCl are mixed according to the mass ratio of 1: 1, and mixed salt is obtained; step 2, uniformly mixing sodium lignin sulfonate and mixed salt according to a mass ratio of 1: (3-5), laying the mixture in a porcelain boat, placing the magnetic boat in a muffle furnace, heating from room temperature to 300-500 DEG C at a heating rate of 3-5 DEG C / min in an N2 gas atmosphere, keeping the temperature for 5-7 hours, and cooling to room temperature along with the furnace to obtain a black reactant; and step 3, cleaning the black reactant for multiple times under the assistance of ultrasonic waves, and drying to obtain the porous carbon. The method has the advantages of low temperature, low energy consumption and environmental protection, and the prepared porous carbon has excellent photo-thermal performance and can fully activate peroxydisulfate so as to efficiently degrade tetracycline.

A method for treating radioactive liquid waste, the method comprising: Adding a metal ion, an oxidizer, and nitrogen oxide to radioactive liquid waste to produce a pretreatment solution; and Irradiating the pretreatment solution with irradiation radiation, wherein the metal ion comprises an iron ion or a copper ion, wherein the oxidizing agent comprises one or more selected from the group consisting of a peroxydisulfate anion (S 2 O 8 2- ) and a salt thereof, wherein an irradiation dose of the irradiation radiation based on an absorbed dose is 1 to 50 kGy.